Yes.  I took the chance and tried to add a PIN.  I was dumb.
Even tho it didn't ask for a PIN, I figured there must be one
so I put in some numbers that were maybes.  Just twice.
Then I stopped.

When I went to the flagship (Eaton's Centre Toronto) I asked
the tech guy to give me a PIN.  He took the sim out, put it
in his own phone and entered a PIN for me.  I think he did
that because he was more familiar with the menu in his
day-to-day phone.

he told me that 3436 (the last 4 digits in the FIDO phone
number) were the default PIN.  hmmm.  that's all I know.
...thehick

There is PIN control and also phonelock code.  I tried to enter a
phonelock code and that buggered things up. I wanted to ensure that if
the phone was lost or stolen, it would be useless for anyone to use
it. After talking with Fido tech, I had two attempts left (tried one
myself and didnt want to go further).  He caused me to lock the phone.
I had to call Siemens.  They will contact me next me with a master
code.  I don't see anywhere there is even a master code prompt (not to
be confused with the PUK code).  I wish the manual was clearer.   :-(

A PIN is not necessarly needed when ever u turn on your cell, there are two
types of PIN there is one for voice mail, or to have acces to different
services over the phone with your cell company ( that s why they call it
acces code), this code is given by the cell company (usually when u first
activate your line by sending you a text message), however if you want to
have a PIN you have to do it on your cell...your cell company would help you
if u ask for help....